文献类型：期刊文献

中文题名：不同CO_2浓度下苦槠(Castanopsis sclerophylla)叶片光合光响应模型模拟比较

英文题名：Comparison of light response modeling of photosynthesis in Castanopsis sclerophylla leaves under different CO_2 concentrations

作者：唐星林[1,2] 曹永慧[1,2] 周本智[1,2] 周燕[3] 顾连宏[4]

第一作者：唐星林

机构：[1]中国林业科学研究院亚热带林业研究所;[2]国家林业局钱江源森林生态系统定位观测研究站;[3]浙江省建德市新安江林场;[4]Environmental Sciences Division,Oak Ridge National Laboratory

年份：2017

卷号：36

期号：7

起止页码：2060-2067

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：国家重点研发计划重点专项(2016YFD0600202);中国林业科学研究院基本科研业务费专项资金项目(CAFYBB2017ZX002-2);中国林业科学研究院基本科研业务费专项资金项目--海内外杰出学者讲习计划(CAFYBB2011007)资助;国家林业局948项目(2014-4-57);浙江省自然科学基金项目(LY13C160002)

语种：中文

中文关键词：光响应模型;净光合速率;苦槠;CO2浓度;光响应参数

外文关键词：light response model; net photosynthetic rate; Castanopsis sclerophylla; C02 con-centration; light response parameter.

分类号：Q945

摘要：以亚热带森林建群种苦槠为试验材料,采用5种光响应模型对4个CO_2浓度下苦槠叶片的光响应曲线进行模拟,比较不同CO_2浓度下适宜的光响应模型,探讨苦槠对CO_2浓度变化的响应规律。结果表明:5种模型对苦槠叶片光响应曲线的拟合效果优劣次序为直角双曲线修正模型>指数改进模型>指数模型>非直角双曲线模型>直角双曲线模型;直角双曲线修正模型对光饱和点(LSP)和最大净光合速率(Pmax)的拟合效果最好,非直角双曲线模型对暗呼吸速率(Rd)的拟合效果最好;5种光响应模型对不同CO_2浓度有不同的适应性,直角双曲线模型、指数模型和直角双曲线修正模型适合低CO_2浓度,非直角双曲线模型适合高CO_2浓度;随CO_2浓度的增加,光补偿点(LCP)和Rd逐渐减小而Pmax逐渐增大;CO_2浓度的增大可以提高苦槠的光合能力及其对弱光的利用能力,并抑制呼吸作用。
The light response curves of Castanopsis sclerophylla leaves, a constructive species in subtropical forest, were measured under four different CO2 concentrations, and were fitted with five models to explore the optimal models for different CO2 concentrations and investigate the adaptability of parameters of C. sclerophylla to CO2 concentrations. The results showed that the fitting effects of the five models were in descending order of modified rectangular hyperbola model 〉 modified exponential model 〉 exponential model 〉 non-rectangular hyperbola model 〉 rectangular hyperbola model. The light saturation point （LSP） and the maximum net photosynthetic rate （Pmax） were best fitted by modified rectangular hyperbola model, and the dark respiration rate （Rd） was best fitted by non-rectangular hyperbola model. The adaptability of the five models to different CO2 concentration varied. Rectangular hyperbola model, exponential model, and modified rectangular hyperbola model were fitted well to the curves under low CO2 concentration, non-rectangular hyperbola model to high CO2 concentration. The light compensation point （LCP） and Rd of C. sclerophylla decreased with the increased CO2 concentration and Pmax increased with the increased CO2 concentration. In conclusion, increased CO2 concentration can improve the photosynthesis and facilitate its use to low light for C. sclerophylla leaves, and suppressed its respiration.